Vildagliptin Impurity E Catalogue V670345 CAS 1789703-37-2 M.W 303.40 M.F C17H25N3O2 Specifications FAQs (3-Hydroxytricyclo[3.3.1.13,7]dec-2-yl)-1-imino-hexahydropyrrolo[1,2-a]pyrazin-4(1H)-one
